simple program for examining Doobie with Monix Task

SimpleSampleMain.scala

package doobie_top

import doobie._
import doobie.implicits._
import cats.effect._
import monix.eval.{Task, TaskApp}

case class Country(code: String, name: String, population: Long)

object SimpleSampleMain extends TaskApp {
  def xa[F[_]: Async: ContextShift]: Transactor[F] = Transactor.fromDriverManager[F](
    "org.postgresql.Driver", "jdbc:postgresql:world", "postgres", "pass"
  )
  def find(n: String): ConnectionIO[Option[Country]] =
    sql"select code, name, population from country where name = $n".query[Country].option

  def run(args: List[String]): Task[ExitCode] = for {
    line <- find("France").transact(xa[Task]) // ConnectionIO[_] ~> Task[_]
    _    <- Task { println(line) }
  } yield ExitCode.Success
}